trait DrawRectangleTrait in Image Effects 8.3

trait DrawRectangleTrait {

  /**
   * {@inheritdoc}
   */
  protected function arguments() {
    return [
      'rectangle' => [
        'description' => 'A PositionedRectangle object.',
      ],
      'fill_color' => [
        'description' => 'The RGBA color of the polygon fill.',
        'required' => FALSE,
        'default' => NULL,
      ],
      'fill_color_luma' => [
        'description' => 'If TRUE, convert RGBA of the polygon fill to best match using luma.',
        'required' => FALSE,
        'default' => FALSE,
      ],
      'border_color' => [
        'description' => 'The RGBA color of the polygon line.',
        'required' => FALSE,
        'default' => NULL,
      ],
      'border_color_luma' => [
        'description' => 'If TRUE, convert RGBA of the polygon line to best match using luma.',
        'required' => FALSE,
        'default' => FALSE,
      ],
    ];
  }

  /**
   * {@inheritdoc}
   */
  protected function validateArguments(array $arguments) {

    // Ensure 'rectangle' is an expected PositionedRectangle object.
    if (!$arguments['rectangle'] instanceof PositionedRectangle) {
      throw new \InvalidArgumentException("PositionedRectangle passed to the 'draw_rectangle' operation is invalid");
    }

    // Match color luma.
    if ($arguments['fill_color'] && $arguments['fill_color_luma']) {
      $arguments['fill_color'] = ColorUtility::matchLuma($arguments['fill_color']);
    }
    if ($arguments['border_color'] && $arguments['border_color_luma']) {
      $arguments['border_color'] = ColorUtility::matchLuma($arguments['border_color']);
    }
    return $arguments;
  }

}